A train is a coming.....

The US has the largest rail transport network in the world, with a total of about 160,000 miles (260,000 km). Railroads are a fundamental part of the US market's transportation of goods. In 2020, commercial rail moved over a quarter of all freight transported in the US, including for critical industries such as energy, chemicals, and agricultural products.

Although it's similar to respect, graffiti on trains can achieve more recognition than writing on walls. As trains traverse cities and even countries, it means graffiti names have the potential to be seen by a much bigger audience than just painting in a static location.